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Male William III de Ferrers , 5th Earl of Derby Click to view William III de Ferrers , 5th Earl of Derby in the family tree

William III de was born about 1193 in Derby, Derbyshire, England.  William III de's father was William II de Ferrers , 4th Earl of Derby and his mother was Agnes of Chester , Lady of Chartley. He had two sisters named Bertha de and Sibyl de.  He was the oldest of the three children.  He died before March 28th, 1254 in Evington, Leicestershire, England.  He was buried on March 31st, 1254 in Sheriff of Lancaster.


William III de's first family with Sibyl Marshal

‌William III de and Sibyl were married in a religious ceremony before May 14th, 1219 in 1st wife.  They had five daughters named Isabel de, Agnes de, Maud (Matilda) de, Eleanor de and Joan de.


William III de's second family with Margaret de Quincy

‌William III de and Margaret de were married in a religious ceremony before 1238 in 2nd wife.  They had two sons and four daughters, named Robert de, William IV, Elizabeth de, Joan de, Agnes de and Berta de.

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